Steam-hammer.



A. J. LARSEN. STEAM HAMMER. APPLICATION FILED AUG. 16, 1912.

- 1,063,360.. 4 Patented June 3, 1913.

. 2 SHEETS-S11E31 1.

A. J. LARSEN.

STEAM HAMMER. APPLICATION FILED AUG.16, 1912.

Patented June 3, 1913.

2 SHEETS-SHEET 2 AKSEL -T. LAESEIbl', 71 BRQUKL'K'N, NEW YORK.

' earners-Eastman.

Specification of Letters Eat-eat.

June 3,

Application filed August 161, 1912. Serial No. 2' 15,315.

To (ZZZ whomit may concern."

. Be it known that I, AKSEL J. Lassen, a citizen of the United States,and residing at and useful Improvements in Steam-Hammers, of which thefollowing is a specification, such as will enable those skilled in theart to which it appertains to. make and use the same.

The object or" this invention is to provide a steam hammer or similardevice or apparatus in which the force of the blow delivered by thehammer is increased without increasing the amount of steam employed, and

without changing the external t'orm of the apparatus to any considerableextent, a further object being to provide a steam hammer device of theclass described in which the upward movement of the piston within thecylindera'nd by' which the hammer is carried is cushioned by compressedsteam when the limit of said movement is reached, and in which asrpplemental floating or unattached piston is employed in connectionwith which the main or first named piston operates, and which adds tothe force of the downward movement of said mam piston, at the beginningthereof, said supplemental or floating piston being also cushioned inboth its upward and downward movements, the efiect of the cushionproduced by its upward movement being to increase the force of itsdownward movement and the force of the hammer, and the effect ofthecushion formed in its downward movement being to prevent shock when thelimit of said movedevice or apparatus of the class specified,

constructed as claimed. v I

r The invention is fully disclosed in the of whichthe accompanyingdrawing forms a part, in which the hereinafter described and separateparts of my invention are designated by suitable reference characters ineach of the views, and in which Figure 1 is a side elevation of a steamhammer involving my invention; and Fig. 2 a central vertical sectionshowing the steam cylinder of the hammer and showing one form of myimprovement.

. In the drawing formlng part of this specification, I have shown asteam hammer of he usualgeneral its construction, a base block a whichis 'slightly tapered or conical in form and which passes verticallythrough a horizon- Brooklyn, in the county of Kings and State of NewYork, have invented certain new tal support a and the top of which ispro vlded with the usual die a on which the whenever desired. The hammerb is protically movable through the bottom portion of the cylinder 0,and said cylinder is sup.- ported in the usual manner by an upright armor standard a secured to the support a and also secured to the cylinder0, as shown at a. The cylinder 0 is-provided at the bo tom thereof witha stuiling box 0 through which the rode of the hammer 73 is move. ble,and said cylinder is also provided with the usual piston chamber 0 andthe rod 2'1 with the usual piston 25* movable vertically insaid'chamber, and all these parts with the exception of the cylinder 0 are ofthe usual form and construction.

At one side of the'cylinder c and directly over the standard or arm a bywhich it is supported is the valve box (5 provided at its lower end witha stuffing box (Z and at its upper end with an exhaust pipe (Z and saidbox is provided with a central vertical chamber and movable through thestufling box (1 is a valve rod d provided within the valve box with twovalves d and d, and .in the outer side of the valve box is a bypass dwhich communicates both with the upper and lower ends of the chamber d*,as shown at d and al a The lower end portion of the cylinder 0 isprovided with a steam passage 6 which communicates with the bottom ofthe piston chamber 0 as shown at 6 and with the bottom portion of thevalve chamber d and the valve box (Z through a port or. passage a andanother steam passage f communicates with the topportion of thevalvechamber d through a port or passage f and withthc to portion of thepiston chamber 0 at f Then the hammer is not in operation the piston 5*or: the rod 5 of the hammer b is in the position shown "in-dotted linesin Figs. 2 and 3,.and the position of said piston, shown in full linesin Fig. 2, is the position term and comprising, in.

vided with a piston. rod 5 which is va it. assumes ust after thebeginning of its downward movement, and in the opposite Lsides'ot thecylinder and in transverse positions corresponding with the position ofthe in Fig. 2, and the valve when said piston is in the position shownin Fig. The top of the cylinder 0 1S enlarged and the top of the pistonchamber (2 is correspondingly enlarged as shown at 0, and at the bottomof the enlarged chamber is an annular shoulder c and by-passes 0 and care formed in the walls of the top portion of the bottom part of thepiston chamber 0 A steam passage 9 communicates with the chamber '0centrally of one side wall thereof, asshowh at 9 and extendslongitudinally and downwardly through the side wall of the cylinder 0adjacent to the valve box 1 and communicates with the said valve box, orthe chamber d centrally thereof at 5/ A crank g is supported inconnection with the standard or arnf afi-at g and one arm thereof isconnected with the lower end of the valve rod 03, and secured to theother arm of said crank is a hand lever g which passes through a keeper9 secured to one side of the standard or arm a and which limits theupward and down-ward movement of the lever g, and the valve rod 9* isoperated by said lever in the usual manner, and as will be readilyunderstood, and the po'rts or passages f 6 and g which communicate withthe valve box d, or the chamber a? therein, are controlled by the valves(Z and d, in the usual manner.

The chamber 0 in the top portion of the cylinder 0 is provided with asteam inlet port h which lies in horizontal alinement with the port orpassage 9 and mounted in said chamber, is a vertically movabledetachedlor floating piston 7L having a downwardly directed neck 72,movable 1n the top part of the piston chamber 0 in which the piston b ismovable.

The operation is as ollows: It will be understood, that when t eapparatus is not in use, the piston 5" is in its lowest position, asindicated indotted lines in Fig. 2. If,

now, it is intended to operate the device the lever g is raised. Thismoves the valves (2 and a? down into their dotted position d passesbelow'the port e and steam rushes through thepas sage 9 into the valvebox (Z and through the passage e into the bottom of the cylinder chambera below the piston 6 In this operation the valve d moves into the dottedposition below the port f and said port j and the port 9 remain open.The 'steam in the bottom of the piston chamber forces the piston 79upwardly and raises the hammer Z), and when the piston 7) passes thelower ends of the by-passes f and f the steam rushes through thesepasses into the space above said piston and this forms a cushion betweenthe pistons [I and If, andthe continuous upward movement of the pis-1by-passes o and 0 into the annular space below the piston h which isformed by the v neck of said piston. At this time the lever g is forceddownwardly and the valves d and (Z moved into the position shown in fulllines in Fig. 2, andthe steam is exhausted through the passages e and (Zand the harm mer 6 starts en its downward movement, this movement beingaccelerated by th'e impact of the piston h on the piston b at thebeginning of this movement, and the cushion in the top of the chamber a.It willbe understood that the effect or result of the downward movementon the piston b. of the hammerb' is the same as in all devices of thisclass, and in the above .downward movement of the piston if an annularcushion is formed around the neck 71. thereof and above the shoulder 0when the lower ends of the by.-

passes a and c -are closed by the neck of.

said piston, and this prevents the piston 71 from striking heavily onthe annular shoulder 0 -The above operation adds greatly to the force ofthe hammer in its downward movement, the weight of the p1s ton 7L andthe etfectof the cushion in the top of the chamberc' accomplishing thisresult, and this advantage isobtained withate the hammer, or withoutadding to the" steam or power employed in ordinary devices of thisclass.

As hereinbefore stated, my improvement relates only to the constructignof the cyl inder; the valve box 03, the bottom portion of said cylinderand the 'method of operating the valves 0? and al being all as usual inthis class of,devices, and if desired,.my improved cylinder, constructedand operating, as herein shown and described, may be applied toapparatus of this class now in use,

out increasing the steam necessary t5'oper-- and it will also beunderstood that my im- .provement is applieable to any kind or class ofsteam hammers and drop hammers, steam drops and similar apparatus now inuse,

and while I have shown the preferred form of my improved steam hammerapparatus, it will be understood that changes in, and modifications ofthe construction may be made, w ithin the scope of the appended claimwithout departing from the spirit of my invention or sacrificing itsadvantages Having fully described my invention what I claim as new anddesire to secure by Letters Patent, is

In an apparatus ofthe class described, a

vertical cylinder having in the bottom portion thereof a main pistonchamber and in the top portion thereof an enlarged supplemc-utal pistonchamber at .the bottom of which is an annular shoulder, a verticallymovable hammer operating piston in the steam passage, and by-passesformed in the main piston chamber, a supplemental versides of the topportion of the main piston tica-lly movable unattached piston in thechamber and opening radially thereinto besupplemental piston chamber andprovided low said annular shoulderand opening up- With a downwardlydirected extension movwardly-through said annular shoulder.

able in the main piston chamber, a steam In testimony that I claim theforegoing-1 A supply passage communicating with the-top as my inventionI have signed my name in portion of the supplemental piston chamber,presence of the subscribing'witnesses this I a second steam supplypassage communicat- 15th day of August 1912.

ing With the top portion of the lnain piston Y AKSEL J. LARSEN. chamber,by passes formed in the sides of Witnesses: the main/piston chamber andcommunioat- S. ANDREWS,

ing therewith above and below the second A. R. APPLEMAN.

